192 lines
7.6 KiB
C
192 lines
7.6 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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/*****************************************************************************
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Source memory.c
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Version 0.1
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Date 2012/10/09
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Product NAS stack
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Subsystem Utilities
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Author Frederic Maurel
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Description Memory access utilities
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*****************************************************************************/
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#include "memory.h"
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#include "commonDef.h"
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#include "nas_log.h"
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#include <stdio.h> // fopen, fread, fclose
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#include <stdlib.h> // getenv, malloc, free
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#include <string.h> // strlen
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/****************************************************************************/
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/**************** E X T E R N A L D E F I N I T I O N S ****************/
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/****************************************************************************/
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/****************************************************************************/
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/******************* L O C A L D E F I N I T I O N S *******************/
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/****************************************************************************/
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/****************************************************************************/
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/****************** E X P O R T E D F U N C T I O N S ******************/
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/****************************************************************************/
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/****************************************************************************
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** **
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** Name: memory_get_path() **
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** **
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** Description: Gets the absolute path of the file where non-volatile **
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** data are located **
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** **
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** Inputs: dirname: The directory where data file is located **
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** filename: The name of the data file **
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** Others: None **
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** **
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** Outputs: None **
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** Return: The absolute path of the non-volatile data **
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** file. The returned value is a dynamically **
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** allocated octet string that needs to be **
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** freed after usage. **
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** Others: None **
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** **
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***************************************************************************/
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char* memory_get_path(const char* dirname, const char* filename)
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{
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/* Get non-volatile data directory */
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const char* path = getenv(dirname);
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if (path == NULL) {
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path = getenv(DEFAULT_NAS_PATH);
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}
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if (path == NULL) {
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LOG_TRACE(WARNING, "MEMORY - %s and %s environment variables are not defined trying local directory", dirname, DEFAULT_NAS_PATH);
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path = ".";
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}
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/* Append non-volatile data file name */
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size_t size = strlen(path) + strlen(filename) + 1;
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char* data_filename = (char*)malloc(size+1);
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if (data_filename != NULL) {
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if (size != sprintf(data_filename, "%s/%s", path, filename)) {
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free(data_filename);
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return NULL;
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}
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}
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return data_filename;
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}
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/****************************************************************************
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** **
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** Name: memory_read() **
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** **
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** Description: Reads data from a non-volatile data file **
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** **
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** Inputs: datafile: The absolute path to the data file **
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** size: The size of the data to read **
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** Others: None **
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** **
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** Outputs: data: Pointer to the data read **
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** Return: RETURNerror, RETURNok **
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** Others: None **
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** **
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***************************************************************************/
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int memory_read(const char* datafile, void* data, size_t size)
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{
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int rc = RETURNerror;
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/* Open the data file for reading operation */
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FILE* fp = fopen(datafile, "rb");
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if (fp != NULL) {
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/* Read data */
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size_t n = fread(data, size, 1, fp);
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if (n == 1) {
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rc = RETURNok;
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}
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/* Close the data file */
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fclose(fp);
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}
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return (rc);
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}
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/****************************************************************************
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** **
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** Name: memory_write() **
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** **
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** Description: Writes data to a non-volatile data file **
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** **
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** Inputs: datafile: The absolute path to the data file **
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** data: Pointer to the data to write **
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** size: The size of the data to write **
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** Others: None **
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** **
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** Outputs: None **
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** Return: RETURNerror, RETURNok **
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** Others: None **
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** **
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***************************************************************************/
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int memory_write(const char* datafile, const void* data, size_t size)
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{
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int rc = RETURNerror;
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/* Open the data file for writing operation */
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FILE* fp = fopen(datafile, "wb");
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if (fp != NULL) {
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/* Write data */
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size_t n = fwrite(data, size, 1, fp);
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if (n == 1) {
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rc = RETURNok;
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}
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/* Close the data file */
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fclose(fp);
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}
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return (rc);
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}
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/****************************************************************************/
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/********************* L O C A L F U N C T I O N S *********************/
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/****************************************************************************/
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